Gatemonium: A Voltage-Tunable Fluxonium
We present a new fluxonium qubit design, gatemonium, based on an all superconductor-semiconductor hybrid platform exhibiting gate voltage tunability of $E_J$. We first show the principle of fluxonium operation in epitaxial Al/InAs heterostructure where the single Josephson junction can be controlled...
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Main Authors | , , , , , , , , |
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Format | Journal Article |
Language | English |
Published |
13.06.2024
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Subjects | |
Online Access | Get full text |
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Summary: | We present a new fluxonium qubit design, gatemonium, based on an all
superconductor-semiconductor hybrid platform exhibiting gate voltage tunability
of $E_J$. We first show the principle of fluxonium operation in epitaxial
Al/InAs heterostructure where the single Josephson junction can be controlled
using gate voltage control, effectively tuning the "weight" of the fictitious
phase particle. The spectroscopy of the qubit shows tunability between plasmons
to fluxons and their hybrid spectrum. We study two gatemonium devices with
different charging energies and extract inductance of InAs-based Josephson
junctions array. We also discuss future directions implementing a gate voltage
tunable superinductance. |
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DOI: | 10.48550/arxiv.2406.09002 |